Question

The graphs of the equations y=2x-7 and y-kx=7 are parallel when k equals

Answer 1

$y=2x-7 \ and \ y-kx=7 \\ \\ y=2x-7 \ and \ y=kx+7 \\ \\ two \ lines \ are \ parallel \ if \ their \ slopes \ are \ the \ same : \\ \\ k= 2$